var datalist={
	dtl:function(){
		var x=document.getElementsByTagName("input")[0];
		var y="<datalist id='cars'><option>111</option><option>222</option></datalist>";
		x.innerHTML=y;
		
	},
	focusFuc:function(){
		var dal=document.getElementsByName("datalist")[0];
		dal.onfocus=function(){
			dal.style.display="none";
		}
	}
}
